Refuse to acknowledge racket pinching pig (6)
I believe the answer is:
disown
'refuse to acknowledge' is the definition.
(I've seen this before)
'racket pinching pig' is the wordplay.
'racket' becomes 'din' (I've seen this before).
'pinching' means one lot of letters goes inside another (taking inside).
'pig' becomes 'sow' (I've seen this before).
'din' going around 'sow' is 'DISOWN'.
(Other definitions for disown that I've seen before include "Repudiate - disinherit" , "Cast aside" , "Repudiate or refuse to acknowledge a relationship" , "Refuse to be connected with" , "Forsake" .)